document.write( "Question 67843: Solve the following sytem by substitution:
\n" ); document.write( "4x - 12y = 5
\n" ); document.write( "-x + 3y = -1\r
\n" ); document.write( "\n" ); document.write( "Thanks
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Algebra.Com's Answer #48246 by tutorcecilia(2152)\"\" \"About 
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4x - 12y = 5
\n" ); document.write( "-x + 3y = -1
\n" ); document.write( ".
\n" ); document.write( "Solve for one of the variables and substitute the solution into the other equation. solve for the second variable.
\n" ); document.write( "-x+3y=-1 [Solve for x (or solve for y)]
\n" ); document.write( "-x=-3y-1
\n" ); document.write( "x=3y+1 [substitute this solution into the other equation and solve for y]
\n" ); document.write( ".
\n" ); document.write( "4x-12y=5
\n" ); document.write( "4(3y+1)-12y=5
\n" ); document.write( "12y+4-12y=5
\n" ); document.write( "4 does not equal to 5, therefore there is no solution to this system. This means that the lines never intersect or cross.
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